JAVA编程题 求解答:import java.util.ArrayList;import java.util.Arrays;import java.util.Collections;public class Homework18_20 {public static void main(String[] args) {Integer[] arr1 = {5,1,4,32,8,7,9,-6};Integer[] arr2 = {5,2,87,10,1};ArrayList<Integer> ar1 = new ArrayList<Integer>(...